Compared to the manufacturer Under Armour, the shirt suggests also good. It is striking that the Ultra Sport product is not quite as close fit (which may be safe for many an advantage).
The Ultra Sport Shirt is a tight squeeze, but not very thick. It can thus attract great in spring or summer, or autumn as the first sub-layer. It is with the "Hot Gear" from Under Armour comparable; So when choosing a compression shirt for winter activities, I suggest slightly thicker compression shirt.